Adjustable log tripping sawmill deck block



Dec. 30, 19 52 H. w. CLARK 2,623,551

ADJUSTABLE LOG TRIPPING SAWMILL DECK BLOCK Filed Dec. 25. 1949 3 Sheets-Sheet 1 INVENTOR.

HUGH W. CL ARK H. w. CLARK ADJUSTABLE LOG TRIPPING SAWMILL DECK BLOCK Filed Dec. 23, 1949 Dec. 30,- 1952 I5 Sheets-Sheet 2 PV 0% m N OM 1| INVENTOR. HUGH W- CLARK Dec. 30, 1952' H. W. CLARK ADJUSTABLE LOG TRIPEING SAWMILL .DECK BLOCK Filed Dec. 23, 1949 3 Sheets-Sheet 3 IN V EN TOR.

W. CLARK HUGH k-r-ronue y,

Patented Dec. 30, 1952 UNITED STATES eTENT orr cs ADJUSTABLE Lsgi 'i l tilPlNG SAWMILL Hugh W. Clark, Troy, N. 0.

Application December 23, 1949, 'SerialNo. 1845831 2 Claims. 1

My invention relates to :a new and useful improvement in an adjustable log tripping sawmill deck block adapted for use in releasing logs for passage onto the carriage which will convey the logs to the saw which will operate upon the logs. Usually the logs are {placed :upon a platform or skid which isinclined downwardly to a carriage onto which the logs are permitted to pass individually after which "the log which has passed upon the carriage is secured in position and the carriage then moved to convey the log past the rotating saw. The present invention is intended as a means for releasing the logs individually for passage. onto the carriage while at the same time restraining the succeeding logs from movement onto the carriage.

It is an object of the present invention to provide a .logtripping' sawmill deck block so arranged and constructed that it may be easily and quickly operated and eliminate the necessity of stationary blocksior "preventing the logs from movement onto the carriage.

Another object of the invention is the provision of a log tripping sawmill deck block so arranged and constructed that it will be slightly automatic in its operation moving to deliver a thrust to the log passing onto the carriage and moving to abutting position against subsequent logs in response to spring Pressure.

Another object of the invention is the provision of a log tripping sawmill deck block which may be easily and -:q-uickly mounted in position on the skid or support.

Another object 'of the invention is the provision of a log tripping sawmill deck block so arranged and constructed that it will be adjusted within certain limits for regulating the distance of movement for the log toward the carriage before the. log is. abutted and restrained. v

Another object of the invention is the provisionof a log tripping sawmill deck block so arranged and constructed that it may be swung to lie at right angles to the normal position to permit a wider cut on the log.

Other objects will appear hereinafter.

It is recognized that various modifications and changes may be made in the detail of structure illustrated without departnig from the invention itself and the present. illustration is intended to be but one embodiment ofJtheinvention.

' Forming a part of this specification are drawings in which:

Fig. 1 is a side elevational'view of the invention applied to a skid illustrating a section taken through the carriage,

her.

Fig. 2 is :a top plan view or "aninstallation of the invention,

Fig. 3 is a side elevational View ofthe invention showing it applied "slightly enlarged over Fig. 1,

Fig. 4 is a top plan view of Fig. 3,

Fig. 5 is a view the sameas Fig. 4 with the butting member swung outwardly at right angles,

Fig. 6 is a front elevational view of the invention showing it applied,

Fig. '7 (Sheet 1-) is a sectional view taken on line 'll of Fig.5,

Fig. 8 is a fragmentary sectional view taken on line 8-8of Fig. 5.

In sawing boardsor other similar material, it is customary to use a movable carriage. Beams l6 and 11 support tracks I8 on which roll the traction wheels 19 supported by the axle zllwhich is carried by the beams 2 i of the carriage. These beams iii are connected by crossmembers22 which serve to support the upwardly projecting standards 23 which carry the log gripping mem- This GO'l'lStIllCtlOll-iS well known and in common use and of itself forms no part; of the present invention. I

A skid or platform is supported by the standards or uprights 24 which are connected to each other by the beam 25 so that a support is thus provided for the skid-bars or beams 26 which are at an incline to the carriage anddown which the logs 2! have a tendency to roll onto the carriage. It is of course necessary that these logs be permitted to pass individually onto'the carriage so that a single log is secured imposition for the sawing operation while thesuccessive logs are held in position on the-skid. V g

The invention comprises an angle iron 28 (Fig. 6) which is fastenedon the members 26;, the members 25 being. preferably recessed, so that the upper face of the angle iron '28 will :lie flush with theupper-face of the member 26. Garried on the vertically extended part of the angle iron 28- at opposite ends thereof arethehousingstil and (it open at their opposite-ends-so that there is thus provided a channel 3| in which the-guide plate 32 may sl-idably' engage. Secured to the guide plate intermediate its ends and projecting outwardly therefrom is a pair of "spaced apart lugs .33. Positionedbetweentlrese iugs-dt and pivoted thereto by the pintaa is-a mean. secured to the hub .t l and projecting outwardly therefrom are the'spaced-apart-arms-85and 36 so that the hub altogether with thesearms' forinsa yoke.

Engaging between these (arms 35 and 36, atan apex, is a triangle cam plate t which is pivoted to the arms 35 and 35 by means of the pin 37. Fixedly mounted on the arm 35 is a collar 38 which forms a hub and through which the pin 31 projects and a cotter pin 35 is projected through this collar 38 and through the pin 37. The plate 40 is provided with a central reinforcing and abutment rib l! which extends outwardly from the pivoted end to the arcuate plate 52. Embracing the pin 31 is a coil spring 43, one end 44 of which bears against a bracket arm 45 mounted on the arm 35. The other end 45 of the coil spring 43 engages the reinforcing rib ll so that the plate 40 is normally retained in its upwardly rocked position shown in Fig, 1 or Fig. 3. When in this position the edge 51 of the plate 46 would engage a log resting on the skid bars and prevent the passage of this log downwardly onto the carriage. When it is desired to release a log for passage onto the carriage the plate 55 may be rocked downwardly, manually or in any other desired manner, against the tension of the spring 63 so that the face 5? of the plate 453 would lie flush with the upper face of the skid bars 25. If the log passing downwardly would ride clear of the face 51 the spring would cause the plate 4 to rock upwardly so that the arcuate face i2 would thus engage the periphery of the log and deliver a thrust to the log to facilitate the passage onto the carriage.

Swingably mounted on the end of the arm is a plate 41. Secured to the plate ll and projecting outwardly therefrom, at right angles to the face thereof, is a guide rod as on which is positioned, in embracing relation, a coil spring :39. One end of this coil spring '49 bears against the face of the plate 4'! and the opposite end seats in a cup 5 which is mounted on the arm 5|, which is secured in fixed relation to the slidable plate 32. At times it is desired to enlarge the cut 63 which is made on the log 21. Particularly is this so if it is desired to split the log. When such is the case the plate may be swung on the pivot 33a from the position shown in Fig. 4 or Fig. 1 to the position shown in Fig. 5 so that the plate is thus extended outwardlyat right angles to the face of the skid bars 26 so as to afford the desired clearance forthe log as it is carried along by the carriage. The construction is such that the spring 49 normally resists this outward swinging of the plate 40 and such that when swung to fully outward position the plate li will be rocked into the position shown in Fig. 5 so as to carry the end of the rod which is secured to the plate 4'! slightly past center. In this way the spring 49 tends to resist swinging of the plate lfrom the position shown in Fig. 5.

Secured to and projecting outwardly from the rear end of the angle iron 26 is a hook 52 to which is attached one end of the spring 53, the other end bein attached to hook 54 projecting downwardly from the lug 33 which is secured to the plate 32 so that the spring 53 serves to normally resist forward sliding of the plate 32, that is a sliding to the left of Fig. 1 or Fig. 3. Projecting downwardly from this plate 32 is a bracket 58 as clearly shown in Fig. 3. Pivoted at one end to the bracket 58 is an arm 59 carrying a stud adapted to engage in the recess 62 formed in the plate t1 which is fixedly mounted on the skid bars at.

ment of the cam plate 40 relatively to the carriage so that the logs 21 on the skid bars may be checked at various positions. This is desirable depending upon the size of the logs and also on the depth of cut to be made.

Secured to the arm 35 and projecting upwardly thereof is a rod havin the angularly turned end 55 which projects inwardly under the flange t2 toward the plate 40 and which is adapted to engage the flange 42a to resist upward rocking movement of the plate 4. In Fig. 3 I have illustrated by the dotted line a step in the forward adjustment of the mechanism. Since the plate t is carried by the plate 32 it is obvious that a sliding movement of the plate will effect a sliding movement of the cam plate At.

This cam plate in addition to serving as an abutment also serves as a thrust delivering member as previously mentioned.

With a log tripping cam constructed in this manner, a speed in operation becomes possible and a most eiiicient checking or'tripping device is thus afforded.

What I claim is:

l. A log tripping sawmill deck block of the class described, comprising: a supporting member adapted for mounting on a stationary surface; a plate slidably mounted on said supporting member; a rockable cam carried by said plate and having an end face formed arcuate; a spring for normally retaining said cam rocked upwardly to project above the upper face of said supporting member; a stationary abutment member for limiting rocking movement of said cam in either direction; a spring for normally retaining said plate slid to a predetermined position relatively to said supporting member and resisting movement of said plate from said position; an arm carried by said plate; an engagement member carried by said arm; and a stationary bracket having a plurality of notches formed therein for reception of said engagement member for securing said plate when slid to various positions from its normal position.

2. A log tripping sawmill deck block of the class described, comprising: a supporting member adapted for mounting on a stationary support; a plate mounted on said supporting member; a pair of lugs extending outwardly from said plate; a yoke pivotally mounted between said lugs, the arms of said yoke being adapted to extend parallel to said plate or at right angles thereto; a spring actuated toggle for normally retaining said yoke in either of said positions; a triangular cam plate pivotally mounted at an apex between the arms of said yoke and rockable upwardly and downwardly; and a spring for normally retaining said plate rocked upwardly to project above the surface of said supporting member and resistin downward rocking of said plate.

HUGH W. CLARK.

REFERENCES CITED The following references are of record name 

